Clean Ventilation Passageway

WARNING: Safety glasses must be worn when performing this operation. Ensure that debris is not blown into the atmosphere which could be harmful to other personnel within the vicinity.


CAUTION: Care must be taken to prevent debris from the passageway passing beyond the throttle valve disc.


NOTE: The cleaning of the plenum chamber ventilation passageway can be carried out without removing the plenum chamber from the ram housing.

1. Disconnect the battery negative terminal.
2. Release the hose clamp and remove the hose from the plenum chamber inlet neck.





3. Remove the crankcase ventilation hose from the side of the plenum chamber.
4. Insert a piece of lint free cloth down the throttle valve bore to prevent debris passing beyond the throttle valve.
5. Place a cloth over the tube protruding from the side of the plenum from which the ventilation hose was removed to prevent debris from the passageway being blown into the atmosphere.
6. Use a compressed air line with a slim bent nozzle to enable the passageway to be cleaned out from within the throttle valve bore.
7. Any remaining consolidated matter can be dislodged using a piece of soft bent wire or a pipe cleaner. Finally the passageway must again be blown out to remove any remaining debris.
8. Remove the small tee piece between the crankcase ventilation hoses and check that it is free from blockages. Clean as necessary.
9. Refit the tee piece and hoses. Tighten the hose clamps securely.